COOLING LARGE VARIABLE FREQUENCY DRIVES - TMEIC

COOLING LARGE VARIABLE FREQUENCY DRIVESThe heat contribution by the converter and inverter sections is approximately 75% of the VFD system heat loss. Typically the VFD system itself is 96 97% efficient. The input isolation transformer is typically 98 99% efficient. VFDs that permit component splitting may offer more packaging and COOLING alternatives for example, being able to locate the input transformer separately (or outdoors) from the COOLING In performing its critical operation, a well-selected VFD COOLING system provides three major functions: 1. Reliably removes the heat from the power semiconductor devices in the inverter, converter, and from their auxiliary components. 2. Maintains the overall VFD temperature for long system life. 3. When optimized, allows the VFD to deliver rated power with the smallest equipment the present time, there are two methods of COOLING a VARIABLE FREQUENCY drive, air COOLING and liquid COOLING .

5. Deionizer cartridge and filter 6. Pipes, valves, and actuators Figures 5a and 5b show typical liquid cooling system process and instrumentation diagrams. This may vary from manufacturer to manufacturer, and even from drive to drive for a particular manufacturer. However, the general concept remains the same.

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  Valves, Cartridge

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